<?php

// +----------------------------------------------------------------------

// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]

// +----------------------------------------------------------------------

// | Copyright (c) 2009 http://thinkphp.cn All rights reserved.

// +----------------------------------------------------------------------

// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )

// +----------------------------------------------------------------------

// | Author: liu21st <liu21st@gmail.com>

// +----------------------------------------------------------------------

namespace Behavior;

/**

 * 浏览器防刷新检测

 */

class BrowserCheckBehavior {

    public function run(&$params) {

        if($_SERVER['REQUEST_METHOD'] == 'GET') {

            //	启用页面防刷新机制

            $guid	=	md5($_SERVER['PHP_SELF']);

            // 浏览器防刷新的时间间隔（秒） 默认为10

            $refleshTime    =   C('LIMIT_REFLESH_TIMES',null,10);

            // 检查页面刷新间隔

            if(cookie('_last_visit_time_'.$guid) && cookie('_last_visit_time_'.$guid)>time()-$refleshTime) {

                // 页面刷新读取浏览器缓存

                header('HTTP/1.1 304 Not Modified');

                exit;

            }else{

                // 缓存当前地址访问时间

                cookie('_last_visit_time_'.$guid, $_SERVER['REQUEST_TIME']);

                //header('Last-Modified:'.(date('D,d M Y H:i:s',$_SERVER['REQUEST_TIME']-C('LIMIT_REFLESH_TIMES'))).' GMT');

            }

        }

    }

}